Locomotive valve-gear.



` H. J. PILLI-OD. i LOOMOTIVE VALVE GEAR. ABPLIG'ATION FILED MAY 2,1910;

`Patented Jan.| 31,

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APPLICATION PILIEDMAY 2, 1910, l

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H. J. PILLIOD. LOCOMUTIVE VALVE GEAR APPLIOATION FILED MAY 2, 1910.

Patented .12111.31, 1911.

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LOCOMOTIVE VALVE-GEAR.

To all whom it may concern:

Be it known that I, HENRY J. PiLLroD, a citizen of the United States,residing' at- Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Locomotive Valve-Gear, of which the followingis a specification.

The invention relates to improvements in locomotive valve gears.

The object of the present invention is to improve the construction oflocomotive valve gears of the falschaert type, and to provide a simpleand easily accessible valve gear in which the evils of valve motion,viz., the unequal port opening, cut-off and release, due to theangularity of the eccentric arm will be corrected in thisrtype of valvegear, and the travel of the valve equalized to produce uniform admissionand release at each end of the cylinder and cut oif at distant pointsfrom each end thereof.

lVith these and other objects in view, the invention consists in theconstruction and' novel combination of parts hereinafter fullydescribed, illustrated in the accompanying drawings, and pointed out inthe claims hereto appended.

In the drawings :Figure 1 is a side elcvation of a portion of alocomotive, provided with valve gears, constructed in accordance withthis invention. Fig. 2 is a plan view of the same. llig. 3 is anenlarged side elevation of the valve gear. Fig. 4- is a perspective viewof the same. Fig. is a transverse sectional view on the line 5--5 ofFig. 1. Fig. 6 is a transverse sectional view on the line G-6 of Fig. 1.Fig. 7 is a trans verse sectional view on the line 7-7 of Fig 1. Fig. 8is a transverse sectional view on the line 8-8 of Fig. 1.

Like numerals of reference designate corresponding parts in all thefigures of the drawings.

The specication is a disclosure of one form of the invention, while theclaims deiine the actual scope of the invention.

ln the embodiment of the invention illustrated in the accompanyingdrawings, the valve gear is equipped w'th an imparting motion devicecomprising central pivot or shaft composed of two sections 1 and 2, andequipped with two cranks 3 and e, arranged at an angle of ninetydegrees. The sections 1 and 2 of the central shaft or pivot areSpecification of Letters Patent. Application filed May 2, 1910.

Patented Jan. 31, 1911. Serial No. 558,823.

equil l l l hung from the gear frame 5 by a hanger 6, arranged at anangle of ninety degrees to the line of motion, and adapted to swinglongitudinally to compensate for vibration and lateral motion of theengine to prevent such motion from fatally affecting' the operation ofthe valve. The hanger 6 is composed of tw`o sides or links, having theirupper ends 7 and 8 fitted together and rigidly secured by set screws 9,or other suitable fastening' devices, to a horizontally disposedtransversely arranged pivot 10. The terminals of the pivot 10 arearranged in bearings of plates 11 and 12, secured by screws, or othersuitable fastening devices to the inner faces of the sides of the gearframe 5. The pivot 10 partially rotates in the bearings of the plates 11and 12 when the hanger oscillates.

The sides or links of the hanger G are laterally bent or off-set at anintermediate pointto space their lower portions to receive the crank 3,which is composed of two arms 13 and 111, rigidly secu 1ed to the innerends of the sections 1 and 2 of the central shaft or pivot, andconnected by a crank pin 15, fixed to the arm 13 and provided with acentral bearing portion to receive an eccentric rod 16, and having a ofthe arm 111 of the crank 3. 15 is threaded beyond the conical portion toreceive a nut 17a, which retains the arm 1&1 on the conical portion ofthe crank pin. The opening in the eccentric rod 16 for the reception ofthe crank pin 15 is preferably provided with a lining 18 of Babbittmetal, or other suitable material. The crank t, which is arranged atright angles to the crank 3, is suitably fixed to the outer end of thesection 1 of the central pivot or shaft.

The opening, which receives the crank pin 15, is arranged near theforward end of the eccentric rod, which is adjustably connected at itsrear end with the return crank 19 of a main crank pin 20. The forwardend 21 of the eccentric rod, which is extended in advance of the centralpivot or shaft of the imparting motion device, is bifurcated to receivethe rear end of an eccentric arm 22, connected to the bifurcated end ofthe eccentric rod by a pivot bolt 23. The crank 4E of the impartingmotion device carries a crank pin or pivot 24, and is connected by a rodor link 25 with an oscillatory lever 26, pivoted at its upper end 27 tothe frame of the valve gear by a pin or bolt 28. The forward end 29 ofthe link or rod 25 is bifurcated to straddle the oscillatory lever 26,and it is pivoted to the same at a point between the ends thereof bymeans of a bolt 30, piercing the sides of the bifurcation and anenlargement of the lever 26, as clearly shown in Figs. 3 and 4 of thedrawings. The lower end of the depending oscillatory lever 26 isconnected by a link 31 to the cross head 32 of the piston. The link 31,which is arranged in an approximately horizontal position, has its rearend 32a bifurcated for the reception of the lower end of the lever 26,and it is pivoted to the same by a bolt 33. The cross head of the pistonis connected with the said crank pin 20 by a main rod 34 of the ordinaryconstruction. hile the piston and it-s crank 4 of the imparting motiondevice are traveling at their highest longitudinal speed, the main pinand the return crank are rounding their dead centers and are at theirslowest longitudinal speed or motion, and a uniform rotative speedthereby results in the imparting motion device. The imparting motiondevice just described is not claimed broadly in the present application,but in a companion` application, executed of even date herewith, andbesides securing perfect uniform rotative speed it compensates forvibration and lateral motion of the engine, which motions have no effecton the transmission of motion to the valve gear.

The eccentric arm is connected at an intermediate point by a. link 25with a rocker arm 36, constituting a portion of a bell crank, which hasits other arm 37 connected with the valve rod 38. The link 35 has itslower portion 39 bifurcated to straddle the eccentric arm, and it issecured to the same by a pivot bolt 40, which pierces the sides of thebifurcated portion 39 and the eccentric arm. The upper end of the link.is secured by a pivot 41 to the free end of the rocker arm 36, which isformed integral with a transverse pivot 42, having reduced terminaljournals 43 and 44, arranged in suitable bearings 45 of the sides of thegear frame. The body portion of the pivot 42 extends entirely across thegear frame and its against the inner faces of the spaced bearings 45, asclearly shown in Figf of the drawings. The arm 36 extends forwardly fromthe pivot 42, and the arm 37 which extends downwardly therefrom, isprovided at its upper end 26 with an opening for the journal 44 and issecured to the same by a set screw 47. The lower end of the dependingarm 37 is secured to the rear end of the valve rod by a suitable pivot48.

The forward end of the eccentric arm is connected by a link 49 with arocker arm 50,

\ tion 54 bifurcated to constituting an arm of a bell crank, which hasits other arm 5l connected by a radius rod with a reversing link of theTalschaert type. The link 49 has its lower porstraddle the front end andit is pivoted to the same by a bolt 55. The upper end of the link 49 isarranged in the bifurcated terminal portion 56 of the rocker arm 50, andis secured to the same by a. pivot bolt 57. The rocker arm 50 is alsoprovided with a substantially U-shaped body portion, extending entirelyacross the gear frame and having laterally extending journals 58 and 59,arranged in suitable bearings of the sides o the gear frame. The journalor pivot 58 is extended beyond the adjacent side of the gear frame, andit forms a support for the bell crank arm 5l. The bell crank arm 5l isprovided at the upper end with a collar 60, which is suitably fixed tothe laterally extending pivot 58 of the rocker arm. The bell crank arm51 extends downwardly from the journal 58, and the forward end of theradius rod is secured to the lower end of the arm 51 by a pivot 6l. Therear portion 62 of the radius rod 52 is forked to straddle the reversinglink, which is provided with a curved longitudinal slot 63, receiving apivot bolt 64, extending through the slot and connecting the sides ofthe bifurcated portion of the radius rod. The reversing link is providedat its center with a substantially L-shaped arm 65, formed integral withthe reversing link and connected with the adjacent side of the gearframe by a central pivot 66 on which the reversing link swings. Anyother suitable means, however, may be employed for centrally pivotingthe reversing link, which connected at its lower portion with theeccentric rod by a reciprocate-ry rod or member 67, secured at its rearend to the eccentric rod by a bolt 68 and pivoted at its forward end bya bolt 69 to an ear 70, formed integral with the reversing link at thelower portion thereof. As the eccentric rod travels in parallel throughits connection with the imparting motion device, cirof the eccentricrod,

cular motion may be obtained from the eccentric rod at any point alongthe saine, and the rod 67 may, therefore, be connected with theeccentric rod at any point. Nhen the eccentric rod is reciprocated thereversing link will be oscillated. The forward end 71 of the rod 67 isbifurcated to straddle the ear 70 of the reversing` link. The pivot bolt64 also connects the rear end of the radius rod with the lower end of arod 72, extending upwardly from the reversing link and pivoted at itsupper end in a bifurcation 73 of an arm 74 of the bell crank by a bolt75. The other arm 76 of the bell crank is connected by a rod 77 with anarm 78 of a rock shaft 7 9, which is connected by a reach rod 80 with areversing lever (not shown).

The bell crank arm 74. extends rearwardly from a transverse pivot 81,having reduced terminal journals 82 and 83, mounted in suitable bearingsof the gear frame. The body portion of t-he pivot extends across thegear frame and tits against the inner faces of the opposite bearings,and the terminal j onrnals 82 and 83 project outwardly beyond thebearings and support the bell crank arms. The bell crank arm 7st isprovided at its pivot end with a sleeve 84:, which is secured. to thejournal 82 by a set screw 85. The other arm 7G, which extends downwardlyfrom the pivot 8l, is provided at its upper end with an openingl toreceive the journal 83, and it is secured to the same by a set screw 86.The rod 77 has its .forward end 87 bifurcated and pivoted to the arm 76by a bolt 88. he rear end 89 of the rod 77 is bifurcated to straddle thearm 78 of the rock shaft 79, and it is pivoted to the said arm 78 at apoint interi'nediate of the ends thereof. by means of a bolt 90. Thereach rod 80 is secured by a. pivot 91 to the free end of the arm 78,which extends upwardly from the rock shaft 79. The reversing lever, (notshown) which is located in the cab of a locomotive, is of the usualconstruction and is operated in the ordinary manner to raise and lowerthe radius rod to shift the same from one end to the other of the radiuslink to reverse the engine, and to more the said rod to different pointsalong' the reversing' link to vary the cnt-off.

The oscillation of the reversing' link through the bell crank arm 5lraises and lowers the rocker arm 50, and imparts a vertical movement tothe forward end of the eccentric arm, and the combined motions, thehorizontal reciprocatory and vertical, cause the intermediate pivot andthe end pivot of the eccentric arm to travel in elliptical paths. Theintermediate pivot described a perfect ellipse, that is, an ellipsewhere there is an equal amount of travel on each side of the center lineof motion, modified by the radius of the intermediate link 55, and theend pivot described a very distorted or elongated ellipse andcompensates for and dissipates the effect of the angulaii'ity of theeccentric arm'. The eccentric arm has angularity, while the eccentricrod owing to its connection to the imparting motion device travels inparallel and has no angularity. Heretofore the forward end of theeccentric arm has always traveled in a fixed or true arcuate path, andthe ellipse described by the intermediate pivot, which is connected withthe valve actuated mechanism, was always irregular being greater on thetop side of the ellipse than side, causing unequal path enables thisinequality in the ellipse to be corrected, and the modiiication of theellipse of the intermediate pivot At() through the elliptical travel ofthe end pivot completely dissipates the effect of the angularity of theeccentric arm and produces an equal travel of the valve at the backwardand forward movements, and secures uniform admission and release at eachend of the cylinder and cut-ott at equi-distant points at each endthereof.

Having thus fully described my invention, what I claim as new' anddesire to secure by Letters Patent, is r` l. A valve gear comprising aneccentric arm, means for transmitting motion from the eccentric arm to avalve, a rocker arm, Ymeans for connecting the rocker arm with theforward end ofthe eccentric arm for causing such end to travel in anelliptical path, reverse mechanism including a reversing link, and aradius rod, and means for transmitting' motion from the radius rod tothe rocker arm.

2. A valve gear comprising an eccentric arm, means for transmittingmotion from the eccentric arm to a valve, a rocker arm, means forconnecting the rocker arm with the forward end of the eccentric arm forcausing such end to travel in an elliptical path, reverse mechanismincluding' a centrally pivoted reversing link, a radius rod movablealong the link to opposite sides of the center thereof for reversing theengine and for varying the cut-ofi", and means for transmitting motionfrom the radius rod to the rocker arm.

3. A valve gear comprising an eccentric arm, means for transmittingmotion from the eccentric arm to a valve, a rocker arm, means forconnecting the rocker arm with the forward end of the said arm forcausing such end to travel in an elliptical path, reverse mechanismincluding a reversing link, and a radius rod, means for transmittingmotion from the radius rod to the rocker arm, and a reciprocatory memberconnected with the reversing link for oscillating the same.

4c. A valve gear comprising an eccentric arm, means for transmittingmotion from the eccentric arm to a val vc, a rocker arm, a linkconnecting the rocker arm with the for "ard end of the eccentric arm forcausing such end to travel in an elliptical path, reverse mechanismincluding a reversing' link, and a radius rod, and means forcoinmunicating motion from the radius rod to the rocker arm.

5. A valve gear comprising an eccentric arm, means for transmittingmotion from the eccentric arm to a valve, a bell crank having' one ofits arms constituting' a rocker arm, a link connecting such rocker armwith the .forward end of the eccentric arm, and

a reversing with the mediate of the ends thereof for transmitting motiontherefrom to a valve, a hell crank having one of its arms constituting arocker arm and located above the eccentric arm, a link connecting therocker arm with the forward end of the eccentric arm, and reversemechanism composed of a reversing` link, and a radius rod connected withthe other arm of the hell crank and with the reversing link. n

l. A valve gear including an eccentric arm, an intermediate rocker arm,a link connecting the intermediate rocker arm with the eccentric arm andpivoted to the latter at a point intermediate of the ends thereof, meansfor transmitting motion from the said rocker arm to a valve, a forwardrocker arm, means for connecting the forward rocker arm with the forwardend of the eccentric arm for causing such end to travel in an ellipticalpath, reverse mechanism comprising a reversing link, and a radius odconnected with the link, and means for transmitting motion from theradius rod to the forward rocker arm,

S. A valve gear including an eccentric arm, a hell crank, a linkconnecting onearm of the bell crank with the eccentric arm and pivotedto the same at a point intermediate of the ends thereof, a valve rodconnected with the other arm of the bell crank, a rocker arm, means forconnecting the rocker arm with the forward end of the eccentric arm forcausing such end to travel in an elliptical path, reverse mechanismcomprising a reversing link, and a radius rod connected with the link,means for transmitting motion from the radius rod to the rocker arm, anda reciprocatory member connected with the reversing link for oscillatingthe same.

9. Avalve gear including an eccentric arm, means for transmitting motionfrom the eccentric arm to a valve, a hell crank having one of its armslocated above the forward end of the eccentric arm and constituting arocker arm, the other arm of the hell crank depending at one side of theeccentric arm, a link connecting the rocker arm with the forward end ofthe eccentric arm, and reverse mechanism comprising a reversing link,and a radius rod connected with the depending arm of the hell crank andwith the reversing link.

10. A valve gear including an eccentric arm, means for transmittingmotion from the eccentric arm to a valve, a rocker arm, a located abovethe forward end of the eccentric arm and provided with a U-shapedportion having laterally extending journals, a

link connecting the rocker arm with the forward end of the eccentricarm, a depending arm supported by one of the journals of the rocker armand connected therewith, a reversing link, and a radius rod connectedwith the reversing link and the said depending arm.

11. A valve gear comprising an eccentric arm, means for transmittingmotion from the eccentric arm to a valve, a rocker arm, a linkconnecting the rocker arm ward end of the eccentric arm for causing suchend to travel in an elliptical path, reverse mechanism including aradius rod, means for transmitting motion from the radius rod to therocker arm, a bell crank having one of its arms connected with theradius rod, and operating mechanism connected with the other arm of thehell crank.

12. A valve gear comprising an eccenwith the for-' tric arm, means fortransmitting motion from the eccentric arm to a valve, a rocker arm, alink connecting the rocker arm with the forward end of the eccentric armfor causing such end to travel in an elliptical path, reverse mechanismincluding a radius rod, means for transmitting motion from the radiusrod to the rocker arm, a bell crank having one of its arms connectedwith the radius rod, a rock shaft, means for connecting the rock shaftwith the other end of the bell crank, and a reach rod connected with therock shaft.

13. A valve gear comprising an eccentric arm, means for transmittingmotion from the eccentric arm to a valve, a rocker arm, a linkconnecting the rocker arm with the forward end of the eccentric arm forcausing such end to travel in an elliptical path, reverse mechanismincluding a radius rod, means for transmitting motion from the radiusrod to the rocker arm, a bell crank having one of its arms connectedwith the radius rod, a rock shaft having an arm, a rod connected withcrank and with the arm of the rock shaft at a point intermediate of theends of the same, and a reach rod connected with the end of the arm ofthe rock shaft.

14. A valve gear comprising an eccentric arm, means for transmittingmotion from the eccentric arm to a valve, a rocker arm, a linkconnecting the rocker arm with the forward end of the eccentric arm forcausing such end to travel in an elliptical path, reverse mechanismincluding a radius rod, means for transmitting motion from the radiusrod to the rocker arm, a hell crank composed of a rearwardly extendingarm, a depending arm, and a connecting pivot, a rod connecting therearwardly extending arm with the radius rod, and operating mechanismconnected with the depending arm of the hell crank.

15. A valve gear including an eccentric the other arm of the bell CIIrod, mechanism connected With` the eccentric rod for causing the same totravel in parallel, an eccentric arm connected with the eccentric rod,means for transmitting motion from the eccentric arm to a valve, arocker arm, means for connecting' the rocker arm With the forward end ofthe eccentric for causing such end to travel in an elliptical path,reverse mechanism including a radius rod, and a reversing link, meansfor connecting' the radins rod with the rocker arm, and a reciprocatorymember connected with the reversing link and with the eccentric rod.

16. In a valve gear, the combination with an eccentric rod, a rotaryshaft having a plurality of crank elements, one of the crank elementsbeing connected with the eccentric rod, mechanism for connecting theother crank element With one of the pistons of a locomotive, aneccentric arm connected with the eccentric rod, means for transmittingmotion from the eccentric arm to a valve, a rocker arm, means forconnecting the rocker arm with the forward end of the eccentric arm forcausing such end to travel in an elliptical path, reverse mechanismincludinga reversing link, and a radius rod, means for transmittingmotion from the radius rod to the rocker arm, and a rod connecting thereversing link with the eccentric rod.

In testimony, that I claim the foregoing` as my own, l have heretoailixed my signature in the presence of two Witnesses.

HENRY J. PILLIOD. lVitnesses CARL l/V. HUNT,

HARRY DE J oANNIs.

